<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="./css/inputnumber.css" />
    <link rel="stylesheet" href="./css/index.css" />
    <title>购物车</title>
  </head>
  <body>
    <div class="app-container" id="app">
      <!-- 顶部banner -->
      <div class="banner-box"><img src="http://autumnfish.cn/static/fruit.jpg" alt="" /></div>
      <!-- 面包屑 -->
      <div class="breadcrumb">
        <span>🏠</span>
        /
        <span>购物车</span>
      </div>
      <!-- 购物车主体 -->
      <div class="main" v-if="isShow">
        <div class="table">
          <!-- 头部 -->
          <div class="thead">
            <div class="tr">
              <div class="th">选中</div>
              <div class="th th-pic">图片</div>
              <div class="th">单价</div>
              <div class="th num-th">个数</div>
              <div class="th">小计</div>
              <div class="th">操作</div>
            </div>
          </div>
          <!-- 身体 -->
          <div class="tbody">
            <div class="tr" v-for="(itme,index) in fruitList" :key="itme.id" :class="{active:itme.isChecked}">
              <div class="td"><input type="checkbox" v-model="itme.isChecked"/></div>
              <div class="td"><img :src="itme.icon" alt="" /></div>
              <div class="td">{{itme.price}}</div>
              <div class="td">
                <div class="my-input-number">
                  <button class="decrease" @click="itme.num > 1?itme.num--:itme.num = 1"> - </button>
                  <span class="my-input__inner">{{itme.num}}</span>
                  <button class="increase" @click="itme.num++"> + </button>
                </div>
              </div>
              <div class="td">{{itme.price * itme.num}}</div>
              <div class="td"><button @click="btndel(index)">删除</button></div>
            </div>
          </div>
        </div>
        <!-- 底部 -->
        <div class="bottom">
          <!-- 全选 -->
          <label class="check-all">
            <input type="checkbox" v-model="isAllSelected" />
          </label>
          <div class="right-box">
            <!-- 所有商品总价 -->
            <span class="price-box">总价&nbsp;&nbsp;:&nbsp;&nbsp;¥&nbsp;<span class="price">{{zhongjia}}</span></span>
            <!-- 结算按钮 -->
            <button class="pay">结算( {{sum}} )</button>
          </div>
        </div>
      </div>
      <!-- 空车 -->
      <div class="empty" v-else>🛒空空如也</div>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
      const app = new Vue({
        el: '#app',
        data: {
          isShow:true,
          // 水果列表
          fruitList: [
            {
              id: 1,
              icon: 'http://autumnfish.cn/static/火龙果.png',
              isChecked: true,
              num: 2,
              price: 6,
            },
            {
              id: 2,
              icon: 'http://autumnfish.cn/static/荔枝.png',
              isChecked: false,
              num: 7,
              price: 20,
            },
            {
              id: 3,
              icon: 'http://autumnfish.cn/static/榴莲.png',
              isChecked: false,
              num: 3,
              price: 40,
            },
            {
              id: 4,
              icon: 'http://autumnfish.cn/static/鸭梨.png',
              isChecked: true,
              num: 10,
              price: 3,
            },
            {
              id: 5,
              icon: 'http://autumnfish.cn/static/樱桃.png',
              isChecked: false,
              num: 20,
              price: 34,
            },
          ],
        },
        computed:{
          isAllSelected:{
            //全选
            set(val){
              this.fruitList.forEach(el => el.isChecked = val)
            },
            //反选
            get() {
              return this.fruitList.every(t =>t.isChecked)
            }
          },
          //结算
          sum(){
            return this.fruitList.filter(el => el.isChecked ).reduce((pir,crv) => {
              return pir+crv.num
            },0)
          },
          zhongjia(){
            return this.fruitList.filter(el => el.isChecked ).reduce((previous, current) => {
              return previous + current.num*current.price
            }, 0)
          }
        },
        methods: {
          //点击删除
          btndel(num){
            this.fruitList.splice(num,1)
            console.log(this.fruitList);
            if(this.fruitList.length === 0){
              this.isShow = false
            }
          }
        },
      })
    </script>
  </body>
</html>